From: Gwendal Grignou gwendal@chromium.org
[ Upstream commit e48bc01ed5adec203676c735365373b31c3c7600 ]
EC is using 32 bit timestamps (us), and before converting it to 64bit they were not casted, so it would overflow every 4s. Regular overflow every ~70 minutes was not taken into account either.
Signed-off-by: Gwendal Grignou gwendal@chromium.org Signed-off-by: Enric Balletbo i Serra enric.balletbo@collabora.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/chrome/cros_ec_sensorhub_ring.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec_sensorhub_ring.c b/drivers/platform/chrome/cros_ec_sensorhub_ring.c index 24e48d96ed766..b1c641c72f515 100644 --- a/drivers/platform/chrome/cros_ec_sensorhub_ring.c +++ b/drivers/platform/chrome/cros_ec_sensorhub_ring.c @@ -419,9 +419,7 @@ cros_ec_sensor_ring_process_event(struct cros_ec_sensorhub *sensorhub, * Disable filtering since we might add more jitter * if b is in a random point in time. */ - new_timestamp = fifo_timestamp - - fifo_info->timestamp * 1000 + - in->timestamp * 1000; + new_timestamp = c - b * 1000 + a * 1000; /* * The timestamp can be stale if we had to use the fifo * info timestamp.